| 418169 | Laurentian | Lawson, Holger | |
| 426480 | Leacock’s | Leacock Sporting Goods Company, Inc. | |
| 513127 | Leacock’s | Leacock Sporting Goods Company, Inc. | |
| 167070 | Leonard | Leonard, H. L. Rod Co | |
| 705188 | Longfellow | Longfellow Products, Inc | |
| 622991 | Netcraft | Ludgate, Herbert T. | |
| 123733 | Company Monogram | Ludgate, Ryder, Thomas & Co | |
| 372651 | L & C | Lyon & Coulson, Inc. |